Παραπομπή σε μορφή APA (7η εκδ.)

O'Connell, S. (1970). Playwork: A book for all those who believe that pigs have wings. ESA.

Παραπομπή σε μορφή Chicago (17η εκδ.)

O'Connell, Sean. Playwork: A Book for All Those Who Believe That Pigs Have Wings. Essex: ESA, 1970.

Παραπομπή σε μορφή MLA (9th εκδ.)

O'Connell, Sean. Playwork: A Book for All Those Who Believe That Pigs Have Wings. ESA, 1970.